package main

import (
	"testing"

	"github.com/novox/mesh-controller/internal/catalogue"
)

// An own secret issued outside the mesh that nobody gave is never made (novox/hq issue 401, ADR 0228). Seen on
// 2026-10-10: the send made a random value for the mounts module's smb-credentials and placed it, and the module read
// it as a credential given and wrong. The send now makes none, places none, and places a value only once a person
// gave one — and a value the mesh made for it before is not placed either.

// anAssistant is a module with a secret the mesh makes and one only an outside party issues.
func anAssistant() catalogue.Manifest {
	return catalogue.Manifest{Module: "assistant", Version: "1",
		OwnSecrets: catalogue.OwnSecrets{
			"password":   {Path: "/var/lib/mesh/assistant/password", Taken: catalogue.TakenAtStart},
			"vendor-key": {Path: "/var/lib/mesh/assistant/vendor-key", Taken: catalogue.TakenAtStart, IssuedBy: catalogue.IssuedOutside},
		},
		Resources: []map[string]any{
			{"id": "state", "type": "directory", "path": "/var/lib/mesh/assistant", "mode": "0700"},
		}}
}

// sentTo composes what a push sends to a machine, on the send path.
func sentTo(t *testing.T, open *stores, node string) []map[string]any {
	t.Helper()
	plan, settings, err := planFor(t.Context(), open, node)
	if err != nil {
		t.Fatal(err)
	}
	declared, err := declarationFor(t.Context(), open, node, plan, settings)
	if err != nil {
		t.Fatalf("the send to %s did not compose: %v", node, err)
	}
	return declared.Resources
}

func placedAt(resources []map[string]any, path string) map[string]any {
	for _, r := range resources {
		if r["path"] == path && r["sealed"] != nil {
			return r
		}
	}
	return nil
}

func TestTheSendMakesNoValueForAnOutsideSecretNobodyGave(t *testing.T) {
	open := aMesh(t)
	ctx := t.Context()
	register(t, open, anAssistant())
	if _, err := assign(ctx, open, "laptop", "assistant"); err != nil {
		t.Fatal(err)
	}

	sent := sentTo(t, open, "laptop")
	if placedAt(sent, "/var/lib/mesh/assistant/password") == nil {
		t.Fatal("the secret the mesh makes was not placed")
	}
	if got := placedAt(sent, "/var/lib/mesh/assistant/vendor-key"); got != nil {
		t.Fatalf("a secret nobody gave was placed: %v", got)
	}
	if _, held, err := open.inventory.ModuleSecretIfIssued(ctx, "laptop", "assistant", "vendor-key"); err != nil || held {
		t.Fatalf("the send made a value for a secret issued outside the mesh (held %v, %v)", held, err)
	}

	// A value the mesh made before this rule is not one a person gave: it is not placed.
	if _, err := open.inventory.SecretForModule(ctx, "laptop", "assistant", "vendor-key"); err != nil {
		t.Fatal(err)
	}
	if got := placedAt(sentTo(t, open, "laptop"), "/var/lib/mesh/assistant/vendor-key"); got != nil {
		t.Fatalf("a value the mesh made for a secret issued outside was placed: %v", got)
	}

	// Given, it is placed.
	if err := open.inventory.AcceptSecretForModule(ctx, "laptop", "assistant", "vendor-key", "the vendor's key"); err != nil {
		t.Fatal(err)
	}
	given, ok, err := open.inventory.GivenOwnSecret(ctx, "laptop", "assistant", "vendor-key")
	if err != nil || !ok || !given.Current {
		t.Fatalf("the value given is not read as given: %+v %v %v", given, ok, err)
	}
	placed := placedAt(sentTo(t, open, "laptop"), "/var/lib/mesh/assistant/vendor-key")
	if placed == nil || placed["sealed"] != given.Sealed {
		t.Fatalf("the value given is placed as %v", placed)
	}
}

// The read paths answer as the send does: a question about the machine composes without the secret nobody gave, and
// asking writes nothing.
func TestAQuestionComposesWithoutAnOutsideSecretNobodyGave(t *testing.T) {
	open := aMesh(t)
	ctx := t.Context()
	register(t, open, anAssistant())
	if _, err := assign(ctx, open, "laptop", "assistant"); err != nil {
		t.Fatal(err)
	}
	pushedBy(t, open, "laptop") // the mesh's own secret is made by the send
	plan, settings, err := planFor(ctx, open, "laptop")
	if err != nil {
		t.Fatal(err)
	}
	gens, err := generators(ctx, open)
	if err != nil {
		t.Fatal(err)
	}
	for _, choosing := range []Choosing{Reading, Foreseeing} {
		got, err := declarationWith(ctx, open, "laptop", plan, settings, gens, choosing)
		if err != nil {
			t.Fatalf("%v: %v", choosing, err)
		}
		if placedAt(got.Resources, "/var/lib/mesh/assistant/vendor-key") != nil || len(got.foreseen) != 0 {
			t.Fatalf("%v: a secret nobody gave is composed (foreseen %v)", choosing, got.foreseen)
		}
	}
	if _, held, err := open.inventory.ModuleSecretIfIssued(ctx, "laptop", "assistant", "vendor-key"); err != nil || held {
		t.Fatalf("a question made a value (held %v, %v)", held, err)
	}
}